Great. We need more theories.
Kinda far fetched.
I am leaning toward something More plausible.
SPACE ALIENS.
Early on considered whether or not flying the aircraft in ground effect would offer any advantage toward stealth or range like the Ekranoplane. For the 777 drag is much higher near sea level vice 30k levels at cruise and came to the conclusion fuel consumption allowed 5 hours duration.
I want the Cloaking Device theory back. It was entertaining.